CN106291133A - A kind of UHF waveband broadband DBF array antenna method of testing - Google Patents
A kind of UHF waveband broadband DBF array antenna method of testing Download PDFInfo
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- CN106291133A CN106291133A CN201610889996.5A CN201610889996A CN106291133A CN 106291133 A CN106291133 A CN 106291133A CN 201610889996 A CN201610889996 A CN 201610889996A CN 106291133 A CN106291133 A CN 106291133A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/10—Radiation diagrams of antennas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4026—Antenna boresight
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Abstract
The invention discloses a kind of UHF waveband broadband DBF array antenna method of testing, be applied to array antenna technical field of measurement and test.The inventive method only obtains each antenna element directional diagram of array antenna to be measured by once test, then described antenna element directional diagram is carried out data process, can obtain the directional diagram of all scanning angles in described array antenna Whole frequency band to be measured.Obtain the directional diagram of described antenna element by controlling the output of each antenna element of described array antenna to be measured during test.Data process to described antenna element directional diagram includes phase alignment and Pattern synthesis two parts.Present invention reduces the complexity of uhf band DBF Antenna testing system and the dependence to test site, simplify testing process, greatly improve versatility and the testing efficiency of test.
Description
Technical field
The present invention relates to array antenna technical field of measurement and test, more particularly, it relates to a kind of UHF (Ultra High
Frequency, 300MHz-1000MHz) wide waveband frequency band DBF (Digital Beam Forming, abridge DBF) array antenna
Method of testing.
Background technology
Digital beam froming be develop rapidly at modern digital integrated circuit, digital device operational capability becomes stronger day by day basis
On carry out a kind of on numeric field formed radar emission and receive wave beam technical finesse means.It is by the reception of each array element
Signal is transformed into base band, and becomes digital signal, then digital signal is made phase shift etc. and processes and multiple wave beams needed for being formed.
Using digital beam technology, phased-array radar can utilize same antenna bore form multiple independent launching beam and receive ripple
Bundle, can improve the search data transfer rate of radar and follow the tracks of data transfer rate；Control beam position flexibly, make reception antenna wave beam have certainly
Adaptation ability, makes radar the most spatially and temporally to filter simultaneously；Make full use of beam energy, use effective survey
Metering method, it is achieved the accurate measurement to target component.
The These characteristics of DBF antenna requires that antenna could be entered by the measurement technology and equipment that must possess high accuracy Larger Dynamic
Row is accurate to be measured.Owing to DBF antenna uses all-digital interface, thus it is mixed with the reception in traditional antenna near-field measurement system
With down coversion incompatible, need to use custom-designed DBF receiver at antenna measurement system.DBF receiver be exclusively for
The receiver of DBF Antenna Design, has the I/Q numeral input of multiple passage, and each passage all has the highest dynamic range.
DBF receiver not only solves the measurement problem of DBF antenna, and has higher function compared with traditional receivers, in spirit
The aspects such as sensitivity, dynamic range, noise basis and measuring speed are better than analogue signal receiver.Additionally need Near-field Data
Carry out processing the far field radiation characteristics that just can obtain antenna to be measured.
At present, during antenna near-field test system and test uhf band DBF array antenna, there are the following problems:
1) uhf band array antenna is when near-field test, and in darkroom, absorbing material is low to the absorbance of this frequency range electromagnetic wave,
Cause popping one's head in too strong with coupling between antenna to be measured, reduce the measuring accuracy of antenna；
2) in darkroom during near-field test bigbore DBF array, due to the confined space and the scanning plane that causes in darkroom
Truncated error relatively big, the measuring accuracy of antenna can be significantly affected；
3) during near-field test, the testing time of single antenna measurement is long, temperature drift the test error caused can reduce
The measuring accuracy of antenna；
4) cost such as DBF receiver is high, and system building is complicated, and test cost is high.
Problem present in DBF array antenna test for above-mentioned UHF waveband, the most conventional method of testing has:
1) in sufficiently large microwave dark room, antenna is carried out far field test；
2) antenna of checkout area test in the open, takes the means of necessity to reduce environment to antenna in test process as far as possible
Impact.
Although far field test can effectively shield outside electromagnetic interference in microwave dark room, can round-the-clock test, to antenna
Play a protective role.But, domestic can meet measuring distance require darkroom few, test all-purpose is the highest.And by limited survey
The error that examination distance introduces can not meet the antenna requirement to measuring accuracy.It addition, possess the test environment of DBF receiver at present
Few, possess the then less of broadband receiver, no matter microwave dark room build-in test or field testing are all by Complicated Testing System
Limit.
More than Zong He, outdoor checkout area test UHF waveband DBF array antenna is compared microwave dark room build-in test and is possessed the biggest
Advantage, including following some:
1) place of outdoor checkout area easily selects, and the place that field is spacious all can be as the test site of antenna；
2), during field testing, antenna to be measured can be enough remote with the spacing of auxiliary antenna, thus eliminating the need limit test
Directional diagram that distance is brought and gain test error；
3) domestic to meet the darkroom that measuring distance requires by antenna less, and test all-purpose is poor；
Summary of the invention
(1) to solve the technical problem that
The present invention provides a kind of method accurately testing uhf band DBF array antenna in far field, uses the method test days
During line, it is not necessary to the reception frequency mixing module in traditional antenna test system and down conversion module, simultaneously also without special DBF
Receiver.
(2) technical scheme
Technical scheme is as follows:
A kind of UHF waveband broadband DBF array antenna method of testing, obtains each sky of array antenna to be measured by test
Line element pattern, then carries out data process to described antenna element directional diagram, it is thus achieved that described array antenna Whole frequency band to be measured
The directional diagram of interior all scanning angles.
By controlling the output of each antenna element of described array antenna to be measured during test, it is thus achieved that described antenna element
Directional diagram.The output of described antenna element is by single pole multiple throw control, and described single pole multiple throw can be at each antenna list
It is switched fast between unit.Described array antenna to be measured is rotated by turning table control, and described turntable is energy under the control of servo controller
Enough rotate and along pitching to-45 °～90 ° rotations along orientation to 0 °～360 °.Uhf band log-periodic antenna is used during test
As standard antenna and reference antenna；Launched signal, described array antenna to be measured and reference antenna by described standard antenna to receive
Described transmitting signal, and the reception signal of described array antenna to be measured and reference antenna is done ratio in vector network analyzer
Process.The purpose of described ratio proccessing is to obtain described array antenna to be measured and the Amplitude Ratio receiving signal of reference antenna and phase
Potential difference.
Described data process and include phase alignment and Pattern synthesis.Described phase alignment is carried out at phase alignment software,
Adjust the phase center of described antenna element and test center overlaps, amplitude and the number of phases to the directional diagram of described antenna element
Interpolation, recovers described antenna element directional diagram in situ.Described Pattern synthesis is carried out by Pattern synthesis software, bag
Include the directional diagram to described antenna element and join phase weighting value, synthetic antenna array direction figure, obtain described array antenna to be measured
The directional diagram under all scanning angles in Whole frequency band.
(3) beneficial effect
(1) turntable rotates a circle and i.e. can get antenna all frequencies directional diagram under different scanning angle, effectively shortens
Testing time, improve testing efficiency；
(2) single pole multiple throw is switched fast the output of each antenna element, effectively shortens the testing time, reduces length
The phase drift that time test causes, improves the measuring accuracy of phase pattern.By phase alignment, and to actual measurement stepping angle
Carry out interpolation, improve Beam synthesis precision；
(3) without increasing the special test equipments such as DBF receiver during antenna measurement, test system complexity is reduced
And testing cost.
(4) coupling between near-field test probe and antenna to be measured, and the scanning plane caused by the confined space are eliminated
Truncated error, improve antenna measuring accuracy；
Accompanying drawing explanation
Fig. 1 is a kind of UHF waveband broadband DBF array antenna method of testing embodiment flow chart according to the present invention；
Fig. 2 is that same antenna method according to embodiments of the present invention demarcates antenna element gain test block diagram；
Fig. 3 is UHF waveband broadband DBF array antenna test block diagram according to embodiments of the present invention；
Fig. 4 is the phase alignment flow process of UHF waveband broadband DBF array antenna method of testing according to embodiments of the present invention
Figure.
Wherein, above-mentioned accompanying drawing includes the following drawings labelling:
DC source 1；Power amplifier 2；Radio-frequency cable 3；Antenna element 4；Turntable 5；Turntable controller 6；Control cable
7；Vector network analyzer 8；Measuring and calculation machine 9；Uhf band log-periodic antenna 10；Optical transmitter and receiver 11；Slide rail 12；Hilted broadsword 30
Two throw microwave switch 13；Array antenna 14 to be measured；Optical fiber 15；Elevating lever 16.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in further detail.
The present invention provides a kind of method accurately testing uhf band DBF array antenna in far field.Use the method test days
During line, it is not necessary to the reception frequency mixing module in traditional antenna test system and down conversion module, simultaneously also without special DBF
Receiver, the output combining single pole multiple throw switching antenna each unit by controlling turntable rotation obtains antenna element direction
Figure, obtains the direction of all scanning angles in array antenna Whole frequency band to be measured by the phase alignment in later stage and Pattern synthesis
Figure, reduces the testing cost of array antenna, greatly improves testing efficiency.The present invention is with 4 × 8DBF array of uhf band
Illustrate as a example by antenna.
Fig. 1 is a kind of UHF waveband broadband DBF array antenna method of testing embodiment flow chart according to the present invention, surveys
Examination flow process is as follows:
Using uhf band log-periodic antenna as standard antenna and reference antenna, array sky to be measured in the embodiment of the present invention
Microwave switch thrown by line rear end order cutter 32.With gun sight axially aligning standard antenna and array antenna to be measured, vector
The Single port output radiofrequency signal of Network Analyzer launches signal to standard antenna, standard antenna, by reference antenna and battle array to be measured
Array antenna receives.Array antenna to be measured is arranged on turntable, by turntable along orientation to rotation, simultaneously by being switched fast hilted broadsword three
12 throw microwave switch, control the output of each antenna element of array antenna to be measured.Array antenna to be measured connects with reference antenna
The signal received exports two to vector network analyzer, three ports respectively, after vector network analyzer inter-process, obtains
The Amplitude Ratio of two channel input signals and phase contrast.Corresponding turntable once rotates 360 °, so that it may obtains array antenna to be measured and owns
The directional diagram of antenna element.
Then the directional diagram to all of antenna element of array antenna to be measured does data process.Data process and are divided into phase place
Calibration and Pattern synthesis two parts.During phase alignment, on phase alignment software, using turntable center as datum mark, adjust
The position of each antenna element deviation turntable center, makes the phase center of antenna element overlap with turntable center, antenna element phase
Position directional diagram is the most smooth in 3dB beam angle.Record offset distance and the offset phase difference of now antenna element.To list
The amplitude of unit's directional diagram and phase number interpolation, recover the directional diagram that antenna element is gone up in situ.
Finally, synthesize wave beam according to directional diagram product theorem, antenna element is joined different shift to value respectively, the most available
Antenna to be measured is the directional diagram under corresponding scanning angle in Whole frequency band.Once test and i.e. can get antenna to be measured institute in Whole frequency band
There is the directional diagram of scanning angle.
In the present invention, turntable can be along rotating to 0 °～360 ° and along bowing along orientation under the control of servo controller
Face upward to-45 °～90 ° rotations.Reference antenna and standard antenna are the log-periodic antenna of uhf band, reference antenna and battle array to be measured
The reception signal of array antenna does ratio proccessing inside vector network analyzer, eliminates because of external environmental interference such as ground returns
The shake of the antenna element directional diagram to be measured caused.The Main Function of gun sight is the most right by standard antenna and antenna to be measured
Accurate.
The concrete operation step of the present invention is as follows:
Step 1: selected spacious place, field is as the test site of antenna.
Step 2: same antenna method demarcates the gain of antenna element.Fig. 2 is same antenna method according to embodiments of the present invention
Demarcate antenna element gain test block diagram.The antenna element of selected several identical and same lots processed, test antenna list respectively
The standing wave of unit, selected immediate two antenna elements of standing wave curve receive sky respectively as signal transmission antenna unit 4 and signal
Line unit 4, demarcates the loss of radio-frequency cable 3 with vector network analyzer 8.Signal transmission antenna unit 4 is installed on elevating lever 16
On, signal receiving antenna unit 4 is erected on turntable 5, with gun sight by signal transmission antenna unit 4 and signal receiving antenna list
Unit 4 axially aligns.The radiofrequency signal of the Single port output of vector network analyzer 8 input extremely letter after power amplifier 2 amplifies
Number transmission antenna unit 4, is launched signal by signal transmission antenna unit 4, and signal receiving antenna unit 4 receives signal.Signal connects
Receive the signal input Two-port netwerk to vector network analyzer 8 of antenna element 4 reception.Concrete test process is as follows:
(1) according to test system building shown in Fig. 2, signal transmission antenna unit 4 and the spacing of signal receiving antenna unit 4
Meeting far field condition, signal transmission antenna unit 4 and signal receiving antenna unit 4 apart from ground more than 1.5m, signal launches sky
Line unit 4 and signal receiving antenna unit 4 geometric center must be erected at equal height, and with gun sight by axial for two antenna elements
Alignment, is placed in same polarization by signal transmission antenna unit 4 and signal receiving antenna unit 4.
(2) open DC source 1, respectively vector network analyzer 8, turntable 5, power amplifier 2 are powered up, pre-to system
Heat.
(3) measuring and calculation machine 9 sends control instruction by controlling cable 7 to turntable controller 6, controls turntable 5 along orientation
To rotating 360 °, obtain the vector network analyzer 8 S under each azimuth21Value (S21Refer to for multiport network, end
During mouth 1 coupling, by the transmission coefficient of port 2 to port 1)；The power level that test obtained, cable loss, space loss enter
Row calculates, and obtains the gain of signal receiving antenna unit 4.Computing formula is as follows:
In above formula, R is the spacing between standard antenna unit and antenna element to be measured, unit: m；
λ is the operation wavelength of antenna, unit: m；
P is vector network analyzer S21Insertion Loss, unit: dB；
L is all connection cable losses, unit: dB.
In order to eliminate the measurement error caused by mismachining tolerance further, by signal transmission antenna unit 4 and signal
Reception antenna unit 4 exchanges, and repeats above test process.Take the meansigma methods gain as antenna element 4 of twice test result
Value.
Step 3: the directional diagram of test DBF array antenna.Fig. 3 is UHF waveband broadband DBF according to embodiments of the present invention
Array antenna test block diagram.In the present embodiment, array antenna 14 to be measured has 32 antenna elements, standard antenna 10 and reference sky
Line 10 all uses the log-periodic antenna being operated in uhf band.Standard antenna 10 is arranged on slide rail 12, can be along on slide rail 12
Lower movement, the angular range of movement is 0 °～90 °.Standard antenna 10 is 100m with the spacing of array antenna 14 to be measured, meets battle array
The far field test condition of array antenna.Turntable 5 is positioned at the circle centre position of arc-shaped slide rail 12, and array antenna 14 to be measured and reference antenna 10 are pacified
It is loaded on turntable.The radiofrequency signal of vector network analyzer 8 Single port output through the modulation of optical transmitter and receiver 11, the transmission of optical fiber 15 and
The demodulation of optical transmitter and receiver 11, ingoing power amplifier 2, then launched, by array antenna 14 to be measured and reference by standard antenna 10
Antenna 10 receives.The signal that array antenna 14 to be measured and reference antenna 10 receive is separately input into vector network analyzer 8
Two, three port.In order to effectively suppress ground return, standard antenna 10, array antenna to be measured 14 and reference antenna 10 are apart from ground
Highly more than 2.5m.
After completing the test system building shown in Fig. 3 and being directed at, starting to test antenna, concrete test process is as follows:
(1) open DC source 1, respectively vector network analyzer 8, turntable 4, power amplifier 2, hilted broadsword 32 are thrown
Microwave switch 13 powers up, and to system warm-up；
(2) hilted broadsword 32 is thrown microwave switch 13 and the amplitude of switch rear end radio-frequency cable 3, the discordance of phase place is entered
Rower is fixed；
(3) standard antenna 10 is raised along slide rail 12 so that the axis of standard antenna 10 and ground angle are 30 °.Will
Pointing instrumentation frame is not in the geometric center of array antenna 14 to be measured, and measuring and calculation machine 9 is by controlling cable 7 to turntable controller 6
Send instruction, control turntable 5 along pitching to rotation, and use gun sight to be directed at so that array antenna 14 to be measured and standard antenna
10 axially align.Standard antenna 10, array antenna to be measured 14 and reference antenna 10 are placed in same polarization；
(4) control turntable 5 along orientation to rotating 360 °, test array antenna 14 to be measured.In test process, vector network
The radiofrequency signal that analyser 8 is launched, through the modulation of optical transmitter and receiver 11, the transmission of optical fiber 15 and the demodulation of optical transmitter and receiver 11, accesses and launches
The power amplifier 2 of end, then gives off the signal of assigned frequency, reference antenna 10 and array sky to be measured by standard antenna 10
Line 14 receives, and measuring and calculation machine 9 sends control instruction realize hilted broadsword 32 by throwing microwave switch 13 to hilted broadsword 32
Throw microwave switch 13 and be switched fast the output of each antenna element of array antenna 14 to be measured.Reference antenna 10 and array antenna to be measured 14
The signal received is exported respectively two to vector network analyzer 8, three ports, through the inside of vector network analyzer 8
Process, the Amplitude Ratio of output two paths of signals and phase contrast, and then obtain the directional diagram of each antenna element of array antenna to be measured；
(5) record test result and the rotation shaft angle of turntable, as the zero setting angle of antenna array.
(6) replace hilted broadsword 32 with the one of uhf band point of 32 power splitter and throw microwave switch, repeat above-mentioned test
Journey, obtains the synthesis normal direction directional diagram of array antenna 14 to be measured.
In test process, hilted broadsword 32 is thrown microwave switch 13 and is switched fast the output of each antenna element, by opening
Close transmission control instruction and realize the gating of each antenna element reception passage, shorten the testing time, improve testing efficiency, simultaneously
Decrease the test error caused by temperature drift.
Step 4: the test DBF gain of array antenna.With in antenna element 4 replacement step 3 having demarcated gain in step 2
Array antenna to be measured 14, repeat step 3 test process.The gain of antenna to be measured is calculated according to formula (2).
GTo be measured=GStandard+PAmax-PBmax+Lloss-Gm (2)
In formula: GStandard-the gain of antenna element 4 demarcated, dBi；
GTo be measuredThe gain of-array antenna 14 to be measured, dBi；
PAmaxThe power level in-antenna maximum direction to be measured, dBm；
PBmax-the power level in antenna element maximum direction demarcated, dBm；
Lloss-cable loss, dBm；
GmThe gain of-power amplifier, dBm.
Step 5: the test data in step 3 are carried out data analysis synthesis.The analysis synthesis of data is broadly divided into phase place
Calibration and Pattern synthesis two parts.
Phase test is generally higher to the requirement of system than amplitude test, and for ensureing measuring accuracy, phase pattern is best
Can complete within the shortest time, meanwhile, in view of the port number of array antenna 14 to be measured is more, select one point of multichannel
Switch and increase stepping angle interval two ways, can be greatly shortened test period.And the increase of stepping angle can affect wave beam and close
The precision become, is therefore accomplished by carrying out phase alignment, and actual measurement stepping angle is carried out interpolation, to improve Beam synthesis precision.
Fig. 4 is the phase alignment flow process of UHF waveband broadband DBF array antenna method of testing according to embodiments of the present invention
Figure.Phase alignment principle is as follows, in phase alignment software, using turntable 5 center in Fig. 3 as datum mark, adjusts battle array to be measured
Distance around each antenna element deviation turntable 5 of array antenna 14 so that the phase fluctuation of this antenna element is in scanning
Angle range is the most smooth, so that it is guaranteed that antenna phase center is in turntable 5 center, records optimal deviation distance, simultaneously
Record phase difference φ of each antenna element skew1、Δφ2、...、Δφn.The ideal that antenna scanning angle is corresponding when being θ
Phase shift value is φ1、φ2、...、φn.Actual phase time of joining, the phase shift value of joining that antenna element is corresponding respectively is Φ1=φ1+Δφ1、
Φ2=φ2+Δφ2、...、Φn=φn+Δφn。
The synthesis of directional diagram is according to directional diagram product theorem, utilizes formula (3) to calculate the synthesis of antenna array azimuth plane
Wave beam, and draw out the azimuth plane directional diagram of antenna.
In above formula, N is antenna array columns；
PtotalAntenna array for calculating receives amplitude leyel, unit: dBm；
PiIt is that the i-th array antenna submatrix receives amplitude, unit: dBm；
ΦiIt is that the i-th array antenna submatrix is joined and is worth mutually, unit: rad.
After once having tested, it is possible to obtain the directional diagram of each antenna element of array antenna 14 to be measured, to each
Antenna element joins phase shift value Φ1、Φ2、...、Φn, i.e. can get array antenna 14 to be measured in Whole frequency band, this amount of phase shift is corresponding
Scan pattern under scanning angle, greatly improves the testing efficiency of antenna.
The directional diagram that the normal orientation figure of synthesis and test when terminating power splitter after array antenna 14 to be measured obtain is done
Relatively, result shows that two directional diagram concordance are fine, it was demonstrated that effectiveness of the invention.
Particular embodiments described above, has been carried out the purpose of the present invention, technical scheme and beneficial effect the most in detail
Describe in detail bright it should be understood that the foregoing is only the specific embodiment of the present invention, be not limited to the present invention, all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included in the protection of the present invention
Within the scope of.
Claims (9)
1. a UHF waveband broadband DBF array antenna method of testing, it is characterised in that
Test obtains each antenna element directional diagram of array antenna to be measured；
Described antenna element directional diagram is carried out data process, it is thus achieved that all scanning angles in described array antenna Whole frequency band to be measured
Directional diagram.
UHF waveband broadband DBF array antenna method of testing the most according to claim 1, it is characterised in that logical during test
Cross the output of each antenna element controlling described array antenna to be measured, it is thus achieved that the directional diagram of described antenna element.
UHF waveband broadband DBF array antenna method of testing the most according to claim 1, it is characterised in that described antenna
The output of unit can be switched fast by single pole multiple throw control, described single pole multiple throw between each antenna element.
UHF waveband broadband DBF array antenna method of testing the most according to claim 1, it is characterised in that described to be measured
Array antenna is rotated by turning table control, described turntable under the control of servo controller can along orientation to 0 °～360 ° rotate with
And along pitching to-45 °～90 ° rotations.
UHF waveband broadband DBF array antenna method of testing the most according to claim 1, it is characterised in that make during test
With uhf band log-periodic antenna as standard antenna and reference antenna；Described standard antenna launches signal, described array to be measured
Antenna and reference antenna receive described transmitting signal, and the signal received is done in vector network analyzer ratio proccessing.
UHF waveband broadband DBF array antenna method of testing the most according to claim 5, it is characterised in that described ratio
The purpose processed is to obtain described array antenna to be measured and the Amplitude Ratio receiving signal of reference antenna and phase contrast.
7., according to the UHF waveband broadband DBF array antenna method of testing described in claim 1 to 6 any one, its feature exists
In, described data process and include phase alignment and Pattern synthesis.
UHF waveband broadband DBF array antenna method of testing the most according to claim 7, it is characterised in that described phase place
Calibration is carried out at phase alignment software, and the phase center adjusting described antenna element overlaps with test center, to described antenna list
The amplitude of the directional diagram of unit and number of phases interpolation, recover described antenna element directional diagram in situ.
UHF waveband broadband DBF array antenna method of testing the most according to claim 7, it is characterised in that described direction
Figure synthesis is carried out by Pattern synthesis software, joins phase weighting value, synthetic antenna including to the directional diagram of described antenna element
Array pattern, obtains described array antenna to be measured directional diagram under all scanning angles in Whole frequency band.
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| CN110068738A (en) * | 2019-05-29 | 2019-07-30 | 成都天成电科科技有限公司 | A kind of phased array antenna test macro and antenna test method |
| CN112130007A (en) * | 2020-09-25 | 2020-12-25 | 四川九洲电器集团有限责任公司 | Antenna far field directional diagram test system and test method |
| CN113533867A (en) * | 2021-07-14 | 2021-10-22 | 西安电子科技大学 | Fourier interpolation-based far field pattern rapid measurement method |
| CN113804985A (en) * | 2021-08-30 | 2021-12-17 | 西安交通大学 | Anti-interference antenna directional pattern measuring method based on hybrid shielding chamber |
| CN116298554A (en) * | 2023-05-11 | 2023-06-23 | 四川九洲电器集团有限责任公司 | Antenna multi-frequency-point directional diagram testing system and method in external field environment |
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